arXiv subjects

Zheng Huang

Publications and source records attributed to Zheng Huang.

92 records · Page 6Linked to original sources

arXiv1992

Dynamical Self-mass for Massive Quarks

We examine dynamical mass generation in QCD with large current mass quarks. A renormalization group analysis is performed to separate fermion self-mass into a dynamical and a kinematical part. It is shown that the energy scale og the Schwinger-Dyson (SD) equation and the effective gauge coupling are fixed by the current mass. The dynamical self-mass satisfies a homogeneous SD equation which has a trivial solution when the current mass exceeds a critical value. We therefore suggest that the quark condensate, as the function of the current mass, observes a local minimum around 2.7Λ_(QCD).

hep-ph↗

arXiv1992

Comments on the Vacuum Orientations in QCD

We study the QCD vacuum orientation angles in correlation with the strong CP phases. A vacuum alignment equation of the dynamical chiral symmetry breaking is derived based on the anomalous Ward identity. It is emphasized that a chiral rotation of the quark field causes a change of the vacuum orientation and a change in the definition of the light pseudoscalar generators. As an illustration of the idea, $\h\rightarrow 2\p$ decays are carefully studied in different chiral frames. Contrary to the claim in Ref.[7], the $θ$-term does not directly contribute to the CP-violating processes.

hep-ph↗